Cárdenas Estrada, R.; Perez Pin, M.; Tejada Solórzano, A.; Cevallos-Torres, L. Application of a Hybrid Model of Theory of Tails and Evolutionary Algo-Rithm to Measure the Optimization in the Service of Attention to the Client in a Place of Fast Food. Ecuad. Sci. J 2019, 3, 15-22.